Steam for Linux has a limited number of games, just so you know. I've played Half-Life 2 from Steam in UberStudent all the way through a couple of times but have not used Steam in Linux for a while. When I tried to run it just now, I got an error about Steam data folders. To fix this, I simply deleted the data folders and ran Steam again and--viola!
Do the following:
1. Hit F12 on your keyboard to call a drop-down terminal
2. Copy the following lines, one line at a time, and paste them into the terminal using Ctrl+V
Code:
cd $HOME
sudo rm -rf *steam*
sudo rm -rf *local*
Now run Steam.
Does it work?
If not, describe in more detail what happens when you try to run Steam, e.g., any messages it gives you, etc.
Here's mine working and ready to game:
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